飞秒时间分辨二维电子光谱仪的研制

项目名称： 飞秒时间分辨二维电子光谱仪的研制

项目编号： No.21227003

项目类型： 专项基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 翁羽翔

作者单位： 中国科学院物理研究所

项目金额： 300万元

中文摘要： 电子相干态的实时观测是继振动相干态导致波包核运动实时测量之后化学动力学发展的又一新方向。电子相干态传能途径已经在光合系统及有机高分子体系中被证实，被认为是一种高效传能的新途径。 二维电子相干光谱是近年来发展起来的、也是目前已知的用于研究电子相干态动力学的唯一手段。我们在迫切需要确认细菌光合天线蛋白色素复合体及光合模拟系统中电子相干态传能的情况下，提出建立国内首套飞秒时间分辨二维电子相干光谱实验测量系统。该系统采用飞秒时间分辨三光子回波技术，利用外差测量方法确定光子回波信号的电场和相位，通过两维傅里叶变换构建飞秒时间分辨二维电子光谱，并最终用于光合系统及人工模拟体系相干电子态传能过程的测量。

中文关键词： 飞秒时间分辨；二维电子光谱；能量传递；电子态相干；

英文摘要： The real-time observation of electronic coherence is expected as the novel direction in physical chemistry after the realization of observing the vibrational coherence subjected to the wave packet motion of the nuclei in real time. Electronic coherent energy transfer in the photosynthetic and organic macromolecule systems at the ambient temperature have been observed recently, which has been proven as an efficient way of energy transfer. Two-dimensional electronic spectroscopy is a recently developed methodology, which is known as the only mean to observe the electronic coherent dynamics at present. We propose to set up a femtosecond time-resolved two-dimensional electronic spectrometer and utilize it to study the electronic coherence in the energy transfer process of the bacterial photosynthetic antenna light harvesting complexes and the artificial photosynthetic systems. The technique of two-dimensional electronic spectroscopy is based on the phase-stabilized three photon echo method, which record the electronic field and the phase of the photon echo signal by a so-call herodyne detection method with an advantage of background-free detection. Two-dimensional electronic spectrum can be constructed by Fourier transformation of the time domain signals and will be utilized in the investigation of coherent energy t

英文关键词： femtosecond time resolved；two-dimensional electronic spectroscopy；energy transfer；electronic state coherence；